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Corporate Office <br /> 3500 American River Drive <br /> P.O. Box 15002 <br /> - Sacramento, CA 95851-1002 <br /> (916)484-3011 •FAX(916)484-7012 <br /> TEICHERT AGGREGATES <br /> Am 11pi 10: 57 <br /> March 23, 1999 <br /> Margaret Lagorio <br /> Environmental Health Division <br /> San Joaquin County <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> i <br /> Dear Ms. Lagorio: <br /> A site investigation of the Traina-Barnes Farms, located at 29900 MacAurthur Drive in <br /> Tracy, conducted the later part of 1996 indicated an area of soil impacted by diesel. Your <br /> - _ -� - <br /> department issued a letter in February 1997 summarizing the low risk to human health <br /> from this area. Teichert Aggregates would like to inform the county of a change of land <br /> use and our intentions to excavate the site. It is our intention to excavate down to the <br /> clay layer, approximately 25 to 30 feet below grade,from the location of SB-2 to SB-5. <br /> This area exhibited the greatest impact from the release diesel from the former farming <br /> operations. We will sample the walls and floor of the excavation. If the results of the <br /> sampling are less than 100 mg/kg we will consider any residual material to be below <br /> action levels. The excavated material will be returned to.the plant site and placed on and <br /> covered by visquin. It will be periodically sampled until it also exhibits results less than <br /> 100 mg/kg at which point it should be safe to feed through the rock plant or asphalt plant. <br /> The LUFT manual sets an action limit of 1000 mg/kg for diesel so Teichert feels that 100, <br /> mg/kg is a reasonable limit to achieve in order to protect public health. It is our intent to <br /> excavate this are on April 1, 1999 weather permitting. <br /> Please contact me at (916) 484-33511 if you would like to observe the operation or if you <br /> need more information. A follow-up report will be made to your office with the <br /> analytical results included. <br /> -Sincerely, <br /> Teichert Aggregates <br /> Becky L. Wood <br /> Environmental Engineer <br /> Attachments <br /> HLA Figures <br /> Letter from Env. Health <br /> Continuing Over A Century of Quality And Service <br /> Printed on recycled paper. SACRAMENTO • ESPARTO • TRACY • TRUCKEE VERNALIS • WOODLAND <br />